Improvement in screw-wrenches



UNITED STATES PATENT OFFICE.

JOHN L. ORIST, OF HARRISBURG, PENNSYLVANIA.

IMPROVEMENT IN SCREW-WRENCHES.

Specification forming part of Letters Patent No. 55,066, dated May 29, 1866.

To all whom fit may concern: r

Be it known that I, JOHN L. ORIST, ot' the c ity of Harrisburg, county of Dauphin, iu the State of Pennsylvania, have invented a new and Im proved Hand-VVrench; and Ido-hereby.

The nature of my invention consists in pro,

viding a ready mode of' adjusting the twojaws of the wrench and securing the same in place.

To enable others skilled in the art to make and use in yinven tion, I will proceed to describe its operation and construction.

A and B represent the two jaws of the wrench, each being attached to their respective stai's A' and B', which lie alongside of each other, and each having engaging teeth (t and b. The lower jaw in my wrench has the hammer part c attached to it. Through this slides A', and it forms a bearing for the same. rlhe rest or lower part of A' bears against B'.

D is a ferrule at top of handle E, and which slides around on it. This ferrule has a slot, d, cut in its top sufficiently large for lower end of A' to work through. A spring-stop, e, on one side of handle enters a hole in i'errule oppbsite the slot, holding the ferrule in` proper and fixed position when thejaw Ais to bead justed.

The operation is as follows: It the jaws A and B are to be closed or opened, press on spring-stop e and revolve ferrule so the slot in it will come opposite the rear side of A', where it will be held by the stop entering' a suitable hole. A can then be taken hold of, lower end of A' raised out ot' i'errule through its slot, teeth of A' and B' be disengaged, and A raised or lowered, and the teeth be brought together again. Pressing then on spring-stop the ferrule can be turned so as to cover completely lower end of A', serving as a detent orlock to hold itin secure contact with B'.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

v1. The combination ot' A A' and B B', operating conjointly in the manner described.

2. The slotted rotating i'errule D, serving also as a lock for sliding jaw A, and operating in the manner shown and described.

JOHN L. GRIST..

Witnesses:

M. S. BoWER, HENRY GILL. 

